152 If 'E.T.' finds Voyager 1, will it phone Earth?
In 1519, Portuguese explorer Ferdinand Magellan launched the expedition that completed the first circumnavigation of the globe. And so humanity learned the full extent of its world. This week, we learned from Science magazine that NASA’s Voyager 1 spacecraft — currently the man-made object farthest from Earth — crossed a boundary of the solar system and entered interstellar space sometime last summer. Like Magellan’s voyage, Voyager’s achievement is a major […]